Two questions, really. What do people think is the best window tint to reject heat and not interfere with radio / key / Bluetooth, etc.. signals. I have Huber Optik on my Lexus, and AM reception was destroyed by it. I was looking into Prestige Photosync , 3M™ Crystalline Automotive Film, Formula One Performance Film. I really don't want it too dark, as I'll have issues seeing out of it. On the other hand, I'd love maximum IR blockage. Also, who do people recommend as a really good / best window tinter in the Tampa Bay area.